[Lxr-general] Finding unreferenced functions

[Michael O'C. <moc...@ya...>]

Hi,

Apologies if this has been asked before. I'm wondering if anyone's tried using
lxr on a codebase to find unreferenced / unused functions. I tried this on a C
/ C++ codebase I've been working in and found it very useful as part of a
clean-up exercise.

It depends on relational database storage of the lxr data (mysql in my case). A
query counting the number of instances of each symbol in the indexes table can
be compared with an equivalent query on the useages table, where the latter
count is <= the former the symbol can be considered unreferenced (i.e. not
used).

It's not foolproof, depends on indexing of all dependent code, and won't find
all instances (due to the regex nature of lxr's symbol finding / storage),
nonetheless I've found it an easy an quick way of finding unused code.

I guess there are better ways of achieving the same result, I'd like to hear
what people think.

Thanks,

Michael


		
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